Chain-saw.



J. DENBEN.

CHMN SAW.

APYLIGATION FILED APR.7,1914.

Patented Nox/.10, 1914.

mlm.

IN VEN TOR, John lleneeyz lllllpl m. QW

ww Nn WITNESSES la 54h74.(- ATTORNEY Jonnnmmnn, or GREENVILLEQCALIFORNIA.

CHAIN saw.

i Specification f Letters Patent.

Patented N ov.` 10, 1914.

application med Aprn v', 1914. serial No. 830,154.

T0 all whom t @apremio-ern.' l Be it known that ll, JOHN DENEEN, a citi zen of the United States, residing at Greenville, in the county of lPlumas and State of California, have invented new and useful lmprovements in Chain Saws, of which the following is a specification.

rThe present invention relates to improvements in chain saws especially in that class of chain saws traveling around a frame and adapted to be operated by power and to be used in cutting down standing timber and cutting it up into logs.

The object of the invention is to provide a saw which will `cut more effectively than heretofore, in which theA saw dust will be more etlectually cleared out of the cut made `to form on each side grooves by the saw, and in which `the saw will be better guided in the frame around which itl travels.

ln the accompanying drawing, Figure 1 is a side view of the chain saw; Fig. 2 is a broken plan View of one end of the frame for the saw; Fig. 3 is a perspective view of a link of the saw; Fig. 4 is a cross-sectional view of the frame.

Referring to the drawing, l indicates a long frame comprising two side pieces 2, and a middle piece 3, secured thereto by rivets 4, and of less width than the side pieces, so as 5 to guide a chain saw. At one end of the frame are secured thereto brackets 6 through holes inwhich passes a power shaft 7, carrying between said brackets a driven wheel 8, having a peripheral groove to receive the chain saw as' hereinafter explained. At the other end are securedA two members 9 of a yoke 10, said members being longitudinally slotted, as shown at 11, to receive therethrough a shaft 12 rotating in bearings 13 secured on the end of members 14 of a yoke 15, through which is screwed a screw 16 abutting against the end of the yoke 10, whereby thev distance from the shaft 7 of the shaftl 12 can be -lengthened or shortened as required. 0n

saidshaft 12 is mounted an idler wheel 17 of the same constructi n as the driven wheel 8.

The chain saw consists of alternately long and short links 21, 22, the short links 22 having each two pivot holes 23 through which, and holes in the ends of long links, pass pivot pins 24 to connect the links t0- gether inr an endless chain. Each long link 2l comprises two plates 25, 26, between which the short links 22 are pivoted. Each plate has a single cutting tooth, the cuttin tooth 27 on 'the plate 25 being at the forwar end of the link, and the cutting tooth 28 of the plate 26 being at the rear end of the link. Both cutting teeth 27, '28 are beveled on their inner forward cutting edges. Each of the plates 25, 26 has a clearing tooth section 29, the section 29 of the plates 26 being nearer to the cutting tooth 28 of said section than the section 29 of the plate 25 is to the cutting tooth 27. Between these two clearing tooth sections 29 is contained an intermediate clearin tooth section 30, formed of a separate piece of metal of the same thickness as the distance between said plates 25, 26. All three sections are riveted together by rivets 31. The intermediate clearing tooth sec tion is extended beyond the backs of said plates, as shown at 32, to form a guide, said guides 32 traveling in the grooves 4 in the. rame. The central portion of the wheels 8 and 17, forming the bottoms of the grooves in said wheels, are polygonal in form, having short sides 33 and long sides 34 correspending in length to the short links 22 and the long links 2l. Each long side of the polygon is formed with a central depression to receive closely fitting therein the extension 32, so thatV said chain is accurately guided in its passage around the wheels.

l regard as important features of my present invention, first, the arrangement of the cutting teeth, in relation to the clearing tooth, one on the link neXtin advance of the clearing tooth and the other on the same link as the' clearing tooth, said cutting teeth being on opposite sides of the chain saw; second, the form of the clearing tooth, which, by the interposition of the intermediate clearing tooth section, is of the full width of the chain saw, and therefore ei'ectually clears the sawdust from the cut; third, the extension 32 from the clearing tooth section,

lsaid extension traveling in the grooves in` the frame and depressions in the wheels while the backs of the links travel upon the edges of the frame, said section 32 thus serving to accurately guide the chain saw in its movement with referencey to the frame.

claim l. A chain saw having links movably connected in an endless series, each link having a clearing tooth and two plates, each plate havin a cutting tooth, one of said cutting teeth eing in front of the clearing tooth and the other behind it.

2. A chain saw having links, each consist'- ing of two plates, said plates having clearing tooth sections and an intermediate clearing tooth section, all of said sections being riveted together.

A3. A chain saw having links, each consisting oct two plates, said p ates having clearing tooth sections and an intermediate clearing tooth section, all of said sections being riveted together, one plate having a single outtin tooth in advance of said clearing tooth, an the-other plate having a cutting tooth behind said clearing tooth.

4. .Ar-chain saw having links, each consistingof two plates, said plates having clearing tooth sections and an intermediate clearing tooth section, all of said sections bein rivet-` ed together, said intermediate section aving an extension past the backs of the two plates.

Inftestimany whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

JOHN DENEEN. Witnesses:

F. M. WRIGHT, D. B. RICHARDS. 

